Apparently Kristen Stewart is worried that her boyfriend Robert Pattinson is going to fall for Scarlett Johansson (he's close to signing on to co-star with her in the film Hate Mail). Well, duh. That may be the first rational thought in the history of Kristen's brain.
From the Chicago Sun Times:
[Robert's] girlfriend and "Twilight" co-star Kristen Stewart is none too happy. Apparently, Stewart has heard one too many tales about Johansson's rumored "maneather" reputation — for allegedly being too chummy with guys with whom she's made movies.
After doing all she could to kibosh tales about the Pattinson romance everyone knew was going on, Stewart only recently slipped and called Pattinson "my boyfriend" in an interview. Supposedly, Stewart is very possessive when it comes to her longtime beau. Pattinson himself is said to be laughing all this off — noting he has worked with many gorgeous women without falling in love, including Reese Witherspoon in "Water For Elephants."